Type-writer carriage-feed.



J. ALEXANDER; TYPE WRITER CARRIAGE FEED.

APPLIflATION IILBD JUNE 22, 1911.

I Patented 0ct. 1 5,;1912;j.

- "Mains-EMT 1.

Fig-1- WIT M58858 I VVENTO/f eAJex v 55 I J. ALEXANDER. TYPE WRITER CARRIAGE FEED. APPLICATION FILED JUNEIZZ, 1911.

Patented Oct. 15, 1912.

Fig- 4|- I WITH/E8858:

I (NI/ENTOR Jase Alexa dr,

Mrramisr JESSE ALExANnEaoF NEW aroma, N. Y., ASSIGNOR or ONE-HALF TO HUDSON I InwELnor NEW YORK, N. Y. I

TYPE-WRITER CARRIAGE-FEED.

1,041,555. J l Specification of Letters Patent. 1 -Pa,tented Oct, 15, 1912.

Application filed June 22, 1911. Serial No; 634,704.

To all whomit may aqncem'." v v A Be it known that I, Jn'ssn ALEXANDER, a

citizen of the United Statesfand resident of v The accompanying two'sheets of drawings Figure 1, is a plan view of a machine showing the elements of my invention.- Fig. 2, is

1 a vertical section of the same showing the parts inside elevation. Fig. 3, is a fragmentary detail-view showing the escapement 55 new and useful Improvements in T e- W'riter Carriage-Feeds, of which the. ollowing is a specification. j

y invention relates particularly to the l escapement mechanism by means of which the step by stepmovement of the carriage is accomplished. 1 i

he main object is to provide a strong and durable construction which'may be operated with rapidity and in which the movement of the carriage may be controlled in its step by toward theleft by any suitable form of ten-- .sion deviceli Fig. 4, is a view similar to Fig.

'3'but showing the'parts in the position to move the toothed rack (and carriage not shown in this figure) backward toward the right in "the direction of the arrow;

, The'main body of the escapement rocker 1 is carried by a shaft 2 suitably supported in the frame ofthe machine 3, the lower arm of. the rocker below the pivot shaft 2 is under tensionof a spring 4 to hold the parts in their normal position of rest. This spring 4 may be adjusted by a screw 5.

' e key and-type bar ,mechanism consists in the form shown of a kpy lever 7 pivoted at 8, a type bar 9 pivoted at-l0 and an interdinary writing operation and in which the; carriage can be moved step by step back 20 ward toward the right underthe control'of a suitableoperating key or lever.

In its preferred form the invention contemplates the mounting of three dogs upon an oscillating rocker and shaft for coracting :5 with a toothed'ra'ck carried by the carriage. a Two of the dogs constitute a .pairgejarelatively stationary-and movable dogs and the other single dog is movable relative to the st two. The two movable dogs are in en- 0. gagement with the toothed rack. When the. shaft which carries the dogs is oscillated b the action of the universal bar both of said,- dogs are ,withdrawn from the rack and the single relatively stationary dog is interposed -to prevent the movement 'of the can, riage untll the releaseof the universal bar.' When the movable .dogs' are disengaged from therack both of them are tiltedtow'ard the right and are in position to be interposed in front of the next teeth on the right when the u'niversalbar. isreleased after operating orspacing The single dogaIso'e-has 'a i movement longitudinally of thefjtoothedrack controlled, by a key lever by means of which thecarriage may Ice-moved. one step tfoward'wthe right 'when the key lever' is deso as to move the carriage backward a time.

vat 13 to the key 1ever'7 and'connected by a link 14 to the type barand having-a sliding engagement with a roll r on the type bar. 7

intermediate levers and is connected at its '80 the pivotshaft 2.

' he carriage 20' ha s any suitable form of Wardlyand the rocker 1 is oscillated about machine and carries a toothed rack 21 with which the dogs cooperate. The left therefore'stationai'y with relation to-it 'a1- ward and forward.-' The dog 23 is pivotedat Y 24 in the'rocker' 1 and under the pressure of illustrate one form of the invention. 50

mediate lever 11 pivoted at 12 and connected hand dog'22'is fixed to the rocker 1 and is though movable about the pivot'shaft2 bac'ka-spring 25 tending to tilt it toward the 9 5 ht. i

rocker 1 of the escapement and carries a dog v28 pivoted at 29. The dog28 is under pressure of the spring 30 to tilt it toward the and provided right in the same manner as the dog 23. In

the normal operation of the machine these two dogs 23 and 2S operate in a similar manner, both of them being normally engaged by the teeth of the rack 21. The pressure of the tension device in moving the carriage toward the left is therefore opposed by two teeth and the pressure and wear is thus distributed. This gives greater durability to the parts.

For the purpose of moving the carriage backward step by step the dog 28 is moved toward the right in adireotion relatively longitudinal of the rack 21 by means for instance, of the rod 32. The shaft 33 extending from front to back of the machine with suitable bearings has an operating arm 34 and finger cap 35.- Near the rear the tending arm 36 connected to the rod 32. :When the finger key 35 is depressed, the shaft 33 is rocked in a right-hand direction as viewed from the front and the arm 36 is rocked toward the right so as to pullthe rod 32 toward the right and bring the carrier 26 and dog 28in the position shownin Fig. 4: The dog 23 is constructed so as to permit the rack 21 to be moved toward the a right as shown in Fig. 4. When the key 35 is released thecarrier 26 and dog 28 are moved toward the left, one tooth of the rack having slipped over the top of the dog 23, the carriage will be retained in the po: sition one space toward the right of its former osition.

By this construction the back spacing dog which is not used to any such extent as the ordinary escapement dog performs also a part of the function of restraining the movement of the carriage in its ordinary writing-control feed movement.

What I claim is:

1. In a typewriting carriage feeding mechanism, a toothed carriage rack, two

dogs normally engaging said rack, .a third dog adapted to engage said rack when said first mentioned dogs are disengaged, universal bar operated means for oscillating said dogs and key controlled means for moving one of said dogs laterally.

2. In a typewriting carriage zfeeding mechanism, two escapement dogs, a common support tl1erefor,'a toothed rack normally engaging said dogs, means for oscillating said dogs and key-controlled means for moving one of said. dogs.

3. In a typewrltmg parnage feed ng mechanism, an oscillating shaft, two dogs carried tl'lQJilflY, a toothed rack engaging said dogs and means for moving one of i moving thereby,

shaft 33 has .an upwardly ex-' trolled means for moving said dogs toward the right with the rack while the other dog snaps by the teeth of the. rack.

4:. Ina typewriting carriage feeding mechanism, two allel to each other and extending from front to rear, means for oscillating said dogs from front to-rear, a toothed rackv-coiiperating with said dogs and key-controlled means for one of said dogs toward the right.

-5. In a typewriting carriage feeding mechanism, an escapement mechanismjconsisting of a rocker and two dogs carried .one of said dogs being movable relatively to the other and a third dog having a movingtensionci n line with the relatively movable first mentioned dog.

6. In a typewriting carriage feeding mechanism, an escapement -mechanism consisting of a rack and two engaged therewith, one of said dogs having a movement in line with the other and keycontrolled means to space the carriage backward,

dogs pivoted on pivots par,

dogs normally a for moving the latter dog 7. In a typewrit-ing carriage feeding mechanism, a carriage rack, a shaft extending transversely of the machine, two escapement dogs carried thereby and normally engaging said rack, an arm extending below said shaft, a universal bar connected to the lower end of said arm' and extending forand type bar wardly thereof and a. key

mechanism including key levers, type bars and intermediate levers connecting said key levers and said type bars, being arranged to be operated by said intermediate levers and to operate said dogs.

8. In a typewriting carriage feeding mechanism, an escapement carrier mounted to oscillate from front to rear of the machine, a toothed rack carriedby the carriage substantially parallel thereto, a back spac-' ing dog carried by said carrier and adapted to be moved toward the right, and key-cons'aid dog toward the right.

9. In a mechanism, to oscillate chine, substantially parallel thereto, a back spacing dog carried by saidv carrier and adapted to be moved toward the right,-key-controlled means for moving said dog toward the right and another pivoted dog for cotiperatmg with said rack.

10. In a typewriting carriage feeding mechanism, two pivoted dogs, a rack nor mally engaging both of said dogs, dog stationary relative to one of said dogs, key-controlled means for moving one of said dogs longitudinally of the rack and univer sal bar operated means for disengaging two of said dogs-from said rack. v

typewriting carriage feeding an escapement carrier mounted from front to rear of the maa thirdsaid universal bar a toothed rack carried .by the carriage 11. In a; typewriting m achinefa carriage engaging shid two gags ahd iiiterposing the rack, a maker, a pivoted spring-pressed dog third dog and key operated means for back- 10 parrieqldby said rgclllzer and normally engzgwardly moving one of said'dogs.

,mg sal raw an ey-controlled means or 11 5 movingsaid d0g.f0r' back spacing. 5 JESSE ALEXANDEIR 12. In a typewriter, a carriage rack, three Witnesses dogs, two .of which normally engage said WARD W. SMITH, rack, universahbar operated means-for: dis- HUDSW' 'BIDWEIL.

Copies of this patent may be obtained for five cents each, By addrgssing the Commissioner of Paints,

' Washington, D. 0. 

